Update dependency ts-loader to v6.1.2

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
ts-loader	devDependencies	patch	6.1.1 -> 6.1.2

---

Release Notes

TypeStrong/ts-loader

### [`v6.1.2`](https://togithub.com/TypeStrong/ts-loader/blob/master/CHANGELOG.md#v612) [Compare Source](https://togithub.com/TypeStrong/ts-loader/compare/v6.1.1...v6.1.2) - [don't emit declaration files for a declaration file](https://togithub.com/TypeStrong/ts-loader/pull/1015) ([#​1014](https://togithub.com/TypeStrong/ts-loader/issues/1014)) - thanks [@​gvinaccia](https://togithub.com/gvinaccia)! - [Consume typescript apis from typescript nightly](https://togithub.com/TypeStrong/ts-loader/pull/1016) - thanks [@​sheetalkamat](https://togithub.com/sheetalkamat)!

---

Renovate configuration

:date: Schedule: At any time (no schedule defined).

:vertical_traffic_light: Automerge: Enabled.

:recycle: Rebasing: Whenever PR becomes conflicted, or if you modify the PR title to begin with "rebase!".

:no_bell: Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Renovate Bot. View repository job log here.